Flexible display panel, and display device having thin film packaging layer with protrusions

A method for packaging a flexible display panel, wherein the flexible display panel comprises:

• a flexible substrate;
• a display element arranged on the flexible substrate;
• and
• a packaging layer covering the display element, the packaging layer comprising an inorganic thin film and an organic thin film that are stacked alternately, and comprising a first inorganic thin film, an organic thin film, and a second inorganic thin film that are stacked sequentially,
• wherein two protrusion structures that are engaged with each other are arranged between at least two adjacent thin films of the packaging layer, and a longitudinal section of each protrusion perpendicular to the flexible substrate is a semi-ellipse or a semi-circle,
• wherein a first protrusion structure and a second protrusion structure that are engaged with each other are arranged between the first inorganic thin film and the organic thin film, and the first protrusion structure and the first inorganic thin film are of an integrated structure,
• wherein a third protrusion structure and a fourth protrusion structure that are engaged with each other are arranged between the organic thin film and the second inorganic thin film, and the third protrusion structure and the organic thin film are of an integrated structure,
• the method comprising:
• alternately depositing an inorganic thin film and an organic thin film on a display element arranged on a flexible substrate to form a packaging layer covering the display element;
• and
• forming two protrusion structures that are engaged with each other between at least two adjacent thin films of the packaging layer.